import java.util.Scanner;
public class Example2_3{
    public static void main(String args[]){
        System.out.println("请输入若干个数，每输入一个数回车确认");
        System.out.println("最后输入数字0结束输入操作");
        Scanner reader = new Scanner(System.in);
        double sum=0;
        double x=reader.nextDouble();
        while (x!=0){
            sum=sum+x;
            x=reader.nextDouble();
        }
        System.out.println("sum="+sum);
     }
}

